He was sentenced to seven years in prison in Monaghan in 2007 after his conviction for extortion against a fellow Lithuanian

He also had previous convictions for rape, robbery and breaking out of prison.

Mr Zelvys sustained a number of gunshot wounds in this morning's attack and was taken to Tallaght Hospital where was later pronounced dead.

Gardaí have appealed to anyone who was in the Greenogue Industrial Estate or Aylmer housing estate in Newcastle between 7am and 10am, and who may have witnessed anything to contact them.

They particularly wish to speak to anyone who saw a silver coloured Audi A3 (5-door hatchback) with the partial registration 05-TN at either location to contact Clondalkin Garda Station on 01-6667600, the Garda Confidential Line on 1800-666-111 or any garda station.

The Rathcoole premises where the shooting took place is believed to be occupied by Progressive Recycling.